The diet of pregnancy is mainly based on light, easy to digest and high protein food. After pregnancy, the volume of the stomach is reduced, which can easily cause nausea, vomiting, indigestion and other discomforts, so it is necessary to eat easy to digest, easy to absorb food, and to reduce the intake of hard, greasy, spicy and irritating and cold food. At present, the fetus needs a lot of nutrition, must pay attention to the adequate intake of high-protein food, eat more milk, eggs, lean meat, fish and other foods, and at the same time, should strengthen the intake of fresh vegetables and fruits that contain trace elements and vitamins B, C, D, and so on. Regular obstetric examination to ensure the healthy growth of the fetus, through the ultrasound can be based on head circumference, abdominal circumference, femur length and other indicators to assess the weight of the fetus.